Mark - got unit for my 2.5 Roadster - installed it and keep getting single red error light and 6 green lights indicating I am not getting a cellular connection. Knowing the AT&T signal at my house is weak, drove to a cell tower and tried again, with the same result, any thoughts?

some days ago i got unit vpr my Renault Twizy with the same Problem as andybm3 has. 6 green lights and one red light after that, all the time, tried it over night in hope to get signal. With my phone i have very good signal quality.

Another failure occured when I tried to turn off the GPRS switch.
The current jumps to 1.5A decreases to 0,5A and the DCDC becomes very hot.
Any idea whats wrong?